PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/12/06-10:12:00 G02 33.5 54.4 6.3 +/- 1.06 7.5 +/- 1.06 0.030 / 0.030 G05 146.5 59.6 10.7 +/- 0.77 12.2 +/- 0.77 0.030 / 0.030 G06 52.3 16.7 4.1 +/- 2.68 9.8 +/- 2.68 0.040 / 0.040 G12 194.8 68.8 8.9 +/- 0.37 9.4 +/- 0.37 0.020 / 0.030 G25 299.3 52.3 7.9 +/- 1.85 9.7 +/- 1.85 0.080 / 0.150 G29 305.2 25.7 5.9 +/- 0.88 11.4 +/- 0.88 0.080 / 0.130